Samsung could win the time race
According to Microsoft UMPC team blog, the Samsung UMPC could be the first one to hit USA Market in April.
“Samsung realistically will be the first units available to purchase in the US, most likely in April. I'm sure you'll see it posted here as soon as we find out they're available. Keep an eye out for availability of other units too such as Founder, ASUS, PaceBlade Japan and others.”